I HAVE CHOPPED ROOFS OFF OF MODELS BEFORE WITH A DREMEL TOOL AND IT KINDA MELTED ITS WAY THRU. I ALSO TRIED TO USE AN EXACTO KNIFE BUT THAT TOOK A LONG TIME AND A FEW STITCHES. HAHA. WHATS THE BEST TOOL TO USE ON A PLASTIC MODEL? IM TRYING TO CUT A 64 IMPALA SS INTO A RADICAL STYLE LOWRIDER.